如图,左图为我国某河流河道示意图,该地岩石主要为砂岩,甲为一河心沙洲,P、Q为航道。右图为该沙洲一年内面积变化统计图。古人常把宝藏藏于“右岸,自飞瀑右行八百步”。读图,回答下列各题。
vegetable, three, woman, question, his